Google has today officially announced that its MVNO cellular network, Project Fi, has teamed up with US Cellular to add more coverage and better speeds for users on top of the current partnerships with Sprint and T-Mobile.

Project Fi launched 10 months ago as an invitation-only MVNO cellular service, and — until now — it usually took at least a few days to get an invite (unless you were lucky enough to get an instant invite given to mark certain occasions). Starting today, Fi has dropped the invitation system and anybody can now sign-up without a wait.

Project Fi will now work on tablets and other compatible data-only devices besides phones. There are no extra fees to add devices to a Fi plan and data still costs $10 for every 1GB you use. That varies from many mainstream carrier plans with charge monthly rates for data access.

Google appears to have started sending out the first invites to its Project Fi initiative, at least according to one user on Reddit. The user has shared screenshots of the entire setup process from start to finish. The process appears to be relatively simple and self-explanatory, with a step-by-step set-up process…